"Enterprise Value" is one of the legitimate measures of company size, and is defined as market capitalization + net debt.
You can think of this as equivalent to the size of the company because it would be the amount of money you'd need (roughly speaking) to buy the entire company outright.
You can think of this as equivalent to the size of the company because it would be the amount of money you'd need (roughly speaking) to buy the entire company outright.